Date: Wed, 3 May 2006 09:43:23 -0700 From: Greg Lewis <glewis@eyesbeyond.com> To: Richard Cooper <ric@jonnycalcutta.com> Cc: freebsd-java@FreeBSD.org Subject: Re: Diablo 1.5 SIGBUS Message-ID: <20060503164323.GD37932@misty.eyesbeyond.com> In-Reply-To: <4458C430.9060005@jonnycalcutta.com> References: <4458C430.9060005@jonnycalcutta.com>
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On Wed, May 03, 2006 at 03:54:40PM +0100, Richard Cooper wrote:
> I'm running tomcat on FreeBSD 6.1-RC with diablo -1.5.0.06.00 (this is
> the current port as of today). This is on an amd64 X2 with SMP running.
>
> I am getting the SIGBUS error that was mentioned back in April -
>
> > I was able to catch the SIGBUS in gdb once so far on a remote
> > multiprocessor system. There was some evidence that the use of
> > of the jvm argument -XX:+UseMembar will help correct the problem.
> > I wasn't readily able to reproduce the problem so I'm not sure
> > yet if this is the proper solution. Can those of you who are
> > getting the SIGBUS try this and see if it improves things?
>
> It seems the problem has some kind of temporary fix at least. _My_
> problem is I am no developer (bash and cgi are about my limits - I'm
> setting up a load test machine for tomcat developers). So if someone
> could be kind enough to give me a quick step by step on how to execute
> this solution I would be eternally grateful. I've looked in
> /usr/local/bin/javavm, as it was suggested adding the above fix there,
> but I wouldn't even know where to start.
You did say bash was within your limits, and javavm is a shell script... :)
A quick and dirty hack would involve something like this. Every where
it invokes tryJavaCommand (there are about 6 instances) you need to add
-XX:+UseMembar. That is, the lines look something like:
tryJavaCommand "PATH_TO_JAVA_COMMAND" "${@}"
make them
tryJavaCommand "PATH_TO_JAVA_COMMAND" -XX:+UseMembar "${@}"
You don't really need to change all six instances, but which to change
depends on your usage pattern, so changing all 6 is safe.
If that works you owe me two beers... ;)
--
Greg Lewis Email : glewis@eyesbeyond.com
Eyes Beyond Web : http://www.eyesbeyond.com
Information Technology FreeBSD : glewis@FreeBSD.org
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